Forming reinforced-concrete floors.



G. M. GRAHAM, 1n. FORMING REINFORCED CONCRETE FLOORS.

APPLICATION FILED MAR. 4. ISM.

Patented May 1, 1917.

GEORGE 1VI. GRAHAM, JR., OF FARGO, NORTH DAKOTA.

FORMING REINFORCED-CONCRETE FLOORS.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed March 4, 1914. Serial No. 822,255.

To all whom it-may concern:

Be it known that I, GEORGE M. GRA- HAM, Jr., a citizen of the United States of America, and a resident of Fargo, in the county of Cass, State of North Dakota, have invented certain new and useful Improvements in Forming Reinforced-Concrete Floors, of which the following is a specification.

This invention relates to means for forming the reinforced concrete floors which constitutes the subject matter of my prior application for Letters Patent Serial No. 759,318, filed April 7, 1913.

And the present improvement has for its object to provide a simple and eflicient arrangement and combination of parts whereby the series of reinforcing anchor bars of the floor with an imposed layer or body of the floor forming cement, are supported against sagging during the period of time required in the setting or hardening of said concrete.

In such construction said layer or body of concrete will comprise the main portion of the floor being built, a space of an inch or more, being left for the subsequent application of a finishing layer of concrete constituting the floor surface, all as will hereinafter more fully appear.

In the accompanying drawings Figure 1, is a fragmentary sectional plan view, showing the means whereby the reinforcing anchor rods, etc., are supported during the formation of the floor.

Fig. 2, is a longitudinal section showing a portion of such means.

Fig. 3,'is an enlarged detail longitudinal section, illustrating the general arrangement of the anchor supporting means, with the mass of concrete in place, and with the form work therefor, also in place.

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 represents the usual vertical metal posts or columns to which are attached the usual longitudinal and transverse beams or girders 2 and 3 of the skeleton frame of the building.

4, are a series of longitudinally disposed reinforcing anchor bars or rods attached at their respective ends to two adjacent transverse beams 3, aforesaid, and preferably in the manner set forth in my aforesaid application, Serial No. 759,318.

In the present improvement, 5 represents a transverse bar or support disposed midway between the two adjacent transverse beams 3, aforesaid, with its ends resting on longitudinal beams 52, and supported thereon and in a plane a distance above the longitudinal and transverse beams 2 and 3, by end blocks or risers 6, as shown. Such elevation of the transverse bar or support 5 is of sufficient height to permit of a free manipulation of the concrete mass during its application to the reinforcing anchor bars 4 and their accessories, in the operation of forming the floor. So that the free spreading and tooling of the mass over the entire area of the floor unit, formed by adjacent pairs of longitudinal and transverse girders 2 and 3, may be effected without any material interference on the part of said bar or support 5.

7 are a series of supporting ties of wire or the like, by which the intermediate portions of the series of longitudinal reinforcing anchor bars or rods 4: are connected to the aforesaid transverse bar 5, to be supported thereby.

A material part of the present invention consists in the arrangement of the aforesaid elevated bar or support 5 in a direction transverse to the series of reinforcing anchor bars or rods 4 aforesaid, in thatv it enables all of the said anchor bars or rods to beconnected to and supported by said elevated bar or support 5 by the series of ties 7 aforesaid.

8 is the ordinary form work or mold, upon which the mass of floor forming concrete is imposed, and in the present improvement, said form or mold is suspended in place'by a series of suspension ties 9 of wire or the like, from the series of longitudinal reinforcing anchor bars 5, as illustrated in Fig. 3.

In the practical carrying out of the present invention a mass of plastic concrete will be placed upon the form work 8, suflicient in quantity to encompass the series of longitudinal reinforcing anchor bars 4:, to the desired degree, after which said mass is left undisturbed for the required number of days to properly set or harden. With such setting or hardening effected, the form work or mold 8 can be removed for use at another portion of the building. In the present invention the application of the aforesaid mass of plastic concrete in an even and uniform manner is rendered easy and convenient, in that the elevated position of the transverse supporting bar 5 provides a clear and unobstructed space for 'efiect-" ing the required spreading and leveling of the mass of concrete.

The ordinary and rougher building operations can be conducted over the partially formed floor above describedyand the final surface floor layer of concrete need only be applied, after such rougher portions of the building operation has been performed. Previous to the application of such final layer of concrete the aforesaid elevated bar or support 5 Will be removed; and the series of Wire ties 7 bent down, so that they Will "be embeddedand covered thereby.

Having thus fully described my said'invention What I claim as new "and desire to secure' by Letters Patent, is

In means for forming reinforced concrete floors, the combination Withthe longitudinail and transverse beams 'of the building structure and theseries of longitudinal reinforcing anchor bars or rods carried by the reinforcing bars aforesaid, and a series of suspension ties i disposed 7' intermediate the lengthiof'and"connecting said'bar With the 'serles of anchor bars or rods, the said elevat- "ed support ng bar being removable and d1sposed in a plane sui'ficiently elevated to permit' of the free "handling-"of the concrete ,.mass as the same is applied to the reinforcunganchorbars'and their accessorles 1n the formation of the floor, substantially asset forth.

' Signed at .Fargo',-'NorthDakota,' day of Februaryy1914.

GEORGE M. GRAHAM,-JR.

this 20th fiepies of this patent may be obtained for fiv'e centseach,-byaddressingthe Commissioner 0'! Patents, WashingtomILG. 

